Timing Chain and Sprockets Removal

Tools Required 

J 5825-A  Crankshaft Gear Remover

1. Remove the crankshaft position sensor reluctor ring.
   Fig 1: Removing Crankshaft Position Sensor Reluctor Ring

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2. Check the camshaft timing chain free play.
   1. Rotate the camshaft sprocket (1) counterclockwise until all slack is removed from the camshaft timing chain (2).
   2. Measure the free play on the slack side (3) of the camshaft timing chain.

      If the camshaft timing chain can be moved side to side in excess of 11 mm (0.43 in), replacement of the camshaft timing chain and the sprockets is recommended during assembly.

      Fig 2: Checking Camshaft Timing Chain Free Play

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3. Remove the camshaft sprocket bolts.
   Fig 3: Removing Camshaft Sprocket Bolts

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4. Remove the camshaft sprocket and the camshaft timing chain.
   Fig 4: Removing Camshaft Sprocket & Camshaft Timing Chain

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   WARNING: Wear safety glasses in order to avoid eye damage.
5. Remove the crankshaft sprocket using the J 5825-A  .
   Fig 5: Removing Crankshaft Sprocket Using J 5825-A

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6. Remove the crankshaft balancer key.
   Fig 6: Removing Crankshaft Balancer Key

   Courtesy of GENERAL MOTORS CORP.